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rg, (Recliner) wrote:
Basil Jet wrote:
On 2014\11\07 10:16, Recliner wrote:
wrote:
I wonder why some trains change at Farringdon then?
Dunno. Maybe they are expected to keep up to speed with changes at
both
stations?
The plan in the TL2000 documents was to do all changeovers at City
instead of Farringdon, because the dual-electrified sidings at City can
be used to get trains with pantographs stuck up or down out of the way
of the other trains. Farringdon of course used to have the
dual-electrified Moorgate Branch as a place to hide trains with stuck
pantographs, but lost that when the platforms were extended over the
junction (which I presume has happened by now), so I'd be very
surprised
if any trains were still changing power at Farringdon.
Are the City Thameslink sidings new?
No, I meant Smithfield sidings, between CTK and ZFD. I think there are still
some sidings south of Blackfriars that could also be used to 'lose' a train
that refuses to change to AC. Note that all the sidings are DC only, so any
train that refuses to accept DC has to be reversed via CTK and sent back
north.
I found the following in
https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/226361/trsp-manufacture-and-supply-agreement-with-schedules.pdf
(details for the supply of new rolling stock from Siemens)
[quote]
2.4.3.1 Proposed Arrangements
All service trains are expected to stop at both City Thameslink and
Farringdon stations
in both directions. Hence the proposed arrangements are that during normal
operation
southbound trains will change over from AC to DC during the stop at
Farringdon, while
northbound trains will change over from DC to AC during the stop at City
Thameslink.
If a southbound train is unable to take traction on DC but can continue on
AC the train
will work forward to City Thameslink where passengers will be de-trained.
The train will then reverse and return north as empty stock on AC (or pick
up a timetable working
from Farringdon).
If a northbound train is unable to take traction on AC but can continue on
DC
passengers will be detrained at City Thameslink. The train will then be
worked forward
to Smithfield Sidings (subject to an 8-car limit) or to Farringdon to
reverse via the
crossover and return south as empty stock on DC (or pick up a timetable
working from
City Thameslink).
[END QUOTE]
I would have thought any train that refuses AC could be reversed via the
crossover at the south end of CTK, rather than at Farringdon.
--
DAS